// ampl.rl written by Victor Zverovich. victor.zverovich@gmail.com
/************************* Required for every parser *************************/
#ifndef OHCOUNT_AMPL_PARSER_H
#define OHCOUNT_AMPL_PARSER_H
#include "../parser_macros.h"
// the name of the language
const char *AMPL_LANG = LANG_AMPL;
// the languages entities
const char *ampl_entities[] = {
"space", "comment", "any"
};
// constants associated with the entities
enum {
AMPL_SPACE = 0, AMPL_COMMENT, AMPL_ANY
};
/*****************************************************************************/
%%{
machine ampl;
write data;
include common "common.rl";
# Line counting machine
action ampl_ccallback {
switch(entity) {
case AMPL_SPACE:
ls
break;
case AMPL_ANY:
code
break;
case INTERNAL_NL:
std_internal_newline(AMPL_LANG)
break;
case NEWLINE:
std_newline(AMPL_LANG)
}
}
ampl_line_comment = '#' @comment nonnewline*;
ampl_block_comment =
'/*' @comment (
newline %{ entity = INTERNAL_NL; } %ampl_ccallback
|
ws
|
(nonnewline - ws) @comment
)* :>> '*/';
ampl_comment = ampl_line_comment | ampl_block_comment;
ampl_line := |*
spaces ${ entity = AMPL_SPACE; } => ampl_ccallback;
ampl_comment;
newline ${ entity = NEWLINE; } => ampl_ccallback;
^space ${ entity = AMPL_ANY; } => ampl_ccallback;
*|;
# Entity machine
action ampl_ecallback {
callback(AMPL_LANG, ampl_entities[entity], cint(ts), cint(te), userdata);
}
ampl_line_comment_entity = '#' nonnewline*;
ampl_block_comment_entity = '/*' any* :>> '*/';
ampl_comment_entity =
ampl_line_comment_entity | ampl_block_comment_entity;
ampl_entity := |*
space+ ${ entity = AMPL_SPACE; } => ampl_ecallback;
ampl_comment_entity ${ entity = AMPL_COMMENT; } => ampl_ecallback;
^space;
*|;
}%%
/************************* Required for every parser *************************/
/* Parses a string buffer with AMPL code.
*
* @param *buffer The string to parse.
* @param length The length of the string to parse.
* @param count Integer flag specifying whether or not to count lines. If yes,
* uses the Ragel machine optimized for counting. Otherwise uses the Ragel
* machine optimized for returning entity positions.
* @param *callback Callback function. If count is set, callback is called for
* every line of code, comment, or blank with 'lcode', 'lcomment', and
* 'lblank' respectively. Otherwise callback is called for each entity found.
*/
void parse_ampl(char *buffer, int length, int count,
void (*callback) (const char *lang, const char *entity, int s,
int e, void *udata),
void *userdata
) {
init
%% write init;
cs = (count) ? ampl_en_ampl_line : ampl_en_ampl_entity;
%% write exec;
// if no newline at EOF; callback contents of last line
if (count) { process_last_line(AMPL_LANG) }
}
#endif
/*****************************************************************************/